Additional file 7.

Distribution of opsin gene expression values among genotypic classes at eQTL loci. Genotypic classes include individuals that are homozygous for Aulonocara baenschi alleles (AA), homozygous for Tramitichromis intermedius alleles (TT), or heterozygous (AT). Marker loci are from the eQTL peaks indicated in Figure 2 and Table 2. Bars represent mean ± 1 SEM. The number of individuals varies among plots, though the average number of individuals is n = 62.60±4.06 SEM.

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O’Quin et al. BMC Evolutionary Biology 2012 12:251   doi:10.1186/1471-2148-12-251